A prefabricated pipe section for parallel pipe jacking lateral holing and a method of using the same

Abstract

This application relates to the field of pipe jacking construction technology, and provides a prefabricated pipe section for lateral opening in parallel pipe jacking and its usage method. The prefabricated pipe section includes a main pipe section one and a main pipe section two. L-shaped channels with through seams are pre-reserved at the four corners of the sidewall of the main pipe section one, and L-shaped steel plates are placed inside the L-shaped channels. A straight groove is provided on the outer side of the main pipe section one; an annular groove is provided on the outer side of the main pipe section two. After the L-shaped steel plates are jacked and fixed, a straight steel plate is sequentially slotted and jacked into the main pipe section one, and the L-shaped steel plate and the straight steel plate are welded together with fillet welds to form a waterproof and soil-retaining sealed space with the main pipe section. Under the protection of the steel ring, the opening of the pipe jacking and the pouring of the connecting channel between parallel pipe jacking sections are completed. This overcomes the water inrush problem during traditional pipe section opening, reduces construction risks, reduces reinforcement costs, and improves construction quality.

Description

Technical Field

[0001] This invention relates to the field of pipe jacking construction technology, specifically to a prefabricated pipe section for parallel pipe jacking with lateral opening and its usage method. Background Technology

[0002] Pipe jacking, as a mechanized trenchless construction technology, boasts advantages such as high mechanization, wide applicability, small construction site requirements, and reduced upfront work volume including open excavation, land acquisition and demolition, and pipeline relocation. It is safe, efficient, and has minimal environmental impact, leading to its increasing use in underground engineering construction and aligning with my country's new development concepts of green, low-carbon, and intelligent manufacturing.

[0003] Due to the limited cross-sectional area of ​​a single jacking pipe, the construction scheme of building large spaces by combining parallel jacking pipes is worth further promotion in the future, and the construction of connection openings between parallel jacking pipes will become more and more common.

[0004] Before traditional parallel pipe jacking can be used to open a tunnel laterally, the ground needs to be reinforced. For water-rich strata, especially silt strata and water-rich sand strata, freezing reinforcement may even be used. This not only results in high cost and long construction period, but also makes it difficult to guarantee the reinforcement effect and has a significant impact on the environment.

[0005] A search revealed that publication number CN111236972A discloses a parallel jacking system for small-section multi-tube underground tunnels. This system includes small-section jacking pipe sections for forming the basic space of the underground tunnel and bearing ground pressure; cast-in-place replacement beam-column structures for replacing the sidewalls of the small-section jacking pipe sections; auxiliary tunnel jacking structures for providing working space for the cast-in-place construction of the replacement beam-column structures; and a temporary support system for temporarily bearing the top load of the small-section jacking pipe sections during the demolition of their sidewalls and before the cast-in-place replacement beam-column structures are subjected to stress. However, this application does not disclose the prefabricated pipe sections used for lateral openings in parallel jacking. Lateral openings for parallel jacking have become a technical problem urgently needing to be solved by those skilled in the art. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a prefabricated pipe section for lateral opening in parallel pipe jacking and its application method, solving the problems of high risk, long construction period, and high cost in traditional parallel pipe jacking opening construction, thereby reducing construction difficulty, saving construction time and cost, and improving construction quality and safety.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: a prefabricated pipe section for parallel jacking with lateral opening, comprising a pipe section body one and a pipe section body two, wherein the four corners of the side wall of the pipe section body one are reserved with L-shaped channels with through seams, and an L-shaped steel plate is placed in the L-shaped channel, wherein the outer side of the L-shaped steel plate has a cutting edge to facilitate jacking during construction.

[0008] The gap between the L-shaped channel and the L-shaped steel plate is sealed with flexible sealant waterproof material to prevent water leakage.

[0009] The outer side of the main body of the pipe section is provided with a straight groove, and the straight groove is filled with flexible sealant.

[0010] The outer side of the main body of the pipe section is provided with an annular groove, and several elastic sealing gaskets are placed in the annular groove.

[0011] Preferably, the flexible sealant waterproofing material is a two-component polysulfide sealant.

[0012] Preferably, the L-shaped steel plate is fixed to the main body of the pipe section by bolts.

[0013] Preferably, the elastic sealing gasket is made of EPDM rubber.

[0014] Preferably, the pipe section is equipped with a prefabricated straight steel plate, the outer side of which has a cutting edge to facilitate jacking during construction.

[0015] The above-mentioned method for using prefabricated pipe sections for parallel pipe jacking with lateral openings includes the following steps:

[0016] Step 1: Prefabricate pipe section body one and pipe section body two;

[0017] Step 2: After the main pipe jacking construction is completed, install jacking devices at the positions corresponding to the L-shaped steel plates inside the main pipe section.

[0018] Step 3: After the jack device is installed, remove the fixing bolts on the L-shaped steel plate;

[0019] Step 4: Use a jack to push the L-shaped steel plate outwards until the end of the L-shaped steel plate enters the pre-reserved annular groove in the main body of the pipe section. The end of the L-shaped steel plate is wrapped with an elastic sealing gasket to prevent water leakage from the gap between the L-shaped steel plate and the annular groove.

[0020] Step 5: Secure the L-shaped steel plate with bolts and remove the jack device;

[0021] Step 6: Make a straight groove on the upper inner wall of the main body of the pipe section, corresponding to the straight groove. When making the groove, take care to protect the flexible sealant filling the straight groove to prevent water leakage.

[0022] Step 7: Place a prefabricated straight steel plate with a cutting edge into the straight groove at the top of the main body of the pipe section;

[0023] Step 8: Install a jack device inside the main body of the pipe section at the position corresponding to the I-shaped steel plate;

[0024] Step 9: Use a jack to push the straight steel plate outwards until the end of the straight steel plate enters the pre-reserved annular groove in the main body of the pipe section. The end of the straight steel plate is wrapped by an elastic sealing gasket to prevent water leakage from the gap between the straight steel plate and the annular groove.

[0025] Step 10: After the straight steel plate at the top of the main body of the pipe section is pushed in, L-shaped steel plates and straight steel plates are welded inside the main body of the pipe section using fillet welding.

[0026] Step 11: Repeat steps 7 to 10 above to complete the jacking and welding of the L-shaped steel plates on both sides and the bottom of the main body of the pipe section. At this time, the L-shaped steel plate, the straight steel plate and the main body of the pipe section have formed a sealed space that can prevent water from getting in and retain soil.

[0027] Step 12: Under the protection of L-shaped steel plates and straight steel plates, complete the opening of the jacking pipe and the pouring of the connecting channel between parallel jacking pipes.

[0028] This invention provides a prefabricated pipe section for lateral opening in parallel pipe jacking and its usage method. It has the following beneficial effects:

[0029] 1. In this invention, the outer side of the L-shaped steel plate has a cutting edge, which facilitates jacking during construction. After the L-shaped steel plate is jacked and fixed, a slotted and straight steel plate is sequentially jacked into the main body of the pipe section, and the L-shaped steel plate and the straight steel plate are welded with fillet welds to form a sealed space with the main body of the pipe section that can be waterproofed and retain soil. Under the protection of the steel ring, the opening of the jacking pipe and the pouring of the connecting channel between parallel jacking pipes are completed. This overcomes the problem of water inrush when opening the pipe section in the traditional way, reduces construction risks, reduces reinforcement costs, and improves construction quality.

[0030] 2. In this invention, the gap between the L-shaped channel and the L-shaped steel plate is sealed with flexible sealant waterproof material. The straight groove is filled with flexible sealant, and several elastic sealing pads are placed in the annular groove to prevent water leakage when the groove is opened and to increase the water-proof performance. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the parallel pipe jacking in this invention;

[0032] Figure 2 Before the prefabricated pipe section of the present invention—an L-shaped steel plate—is jacked in, Figure 1 Schematic diagram of the cross-section at point AA;

[0033] Figure 3 Before the prefabricated pipe section of the present invention—an L-shaped steel plate—is jacked in, Figure 1 Schematic diagram of the cross-section at point BB;

[0034] Figure 4Before the prefabricated pipe section of the present invention—an L-shaped steel plate—is jacked in, Figure 1 Schematic diagram of the cross-section at point CC;

[0035] Figure 5 Before the prefabricated pipe section of the present invention—an L-shaped steel plate—is jacked in, Figure 1 Schematic diagram of the cross-section at point DD;

[0036] Figure 6 Before the prefabricated pipe section of the present invention—an L-shaped steel plate—is jacked in, Figure 1 Schematic diagram of the cross-section at the middle EE section;

[0037] Figure 7 The present invention relates to a prefabricated pipe section, specifically an L-shaped steel plate, which is jacked in after the pipe section is installed. Figure 1 Schematic diagram of the cross-section at point DD;

[0038] Figure 8 When the top of the prefabricated pipe section of the present invention is grooved, Figure 1 Schematic diagram of the cross section at point AA;

[0039] Figure 9 The prefabricated pipe section of this invention is placed after the straight steel plate is in place. Figure 1 Schematic diagram of the cross-section at the middle EE section;

[0040] Figure 10 The prefabricated pipe section of this invention is inserted after the straight steel plate is pushed in. Figure 1 Schematic diagram of the cross-section at the middle EE section;

[0041] Figure 11 The prefabricated pipe section of this invention is inserted after the straight steel plate is pushed in. Figure 1 Schematic diagram of the cross-section at point AA;

[0042] Figure 12 When making openings in the sidewalls of prefabricated pipe sections according to the present invention... Figure 1 Schematic diagram of the cross-section at the middle EE section;

[0043] Figure 13 This is a detailed cross-sectional view of the elastic sealing gasket of the present invention.

[0044] The components are as follows: 1. Pipe section body one; 2. Pipe section body two; 3. L-shaped channel; 4. L-shaped steel plate; 5. Flexible sealant; 6. I-shaped groove; 7. Bolt; 8. Annular groove; 9. Elastic sealing gasket; 10. I-shaped steel plate; 11. Jack device; 12. I-shaped groove; 13. Fillet weld. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Please see the appendix Figure 1 - Appendix Figure 13 The prefabricated pipe section for parallel jacking lateral opening in this embodiment includes a pipe section body 1 and a pipe section body 2. The four corners of the side wall of the pipe section body 1 have L-shaped channels 3 with through gaps. An L-shaped steel plate 4 is placed in the L-shaped channel 3. The outer side of the L-shaped steel plate 4 has a cutting edge, which is conducive to jacking during construction.

[0047] The gap between the L-shaped channel 3 and the L-shaped steel plate 4 is sealed with flexible sealant 5 waterproof material to prevent water leakage.

[0048] A straight groove 6 is provided on the outer side of the main body of the pipe section 1, and the straight groove 6 is filled with flexible sealant 5;

[0049] An annular groove 8 is provided on the outer side of the main body 2 of the pipe section, and several elastic sealing gaskets 9 are placed in the annular groove 8.

[0050] L-shaped steel plate 4 is fixed to the main body of pipe section 1 by bolts 7. Before the pipe jacking is completed, jacking device 11 is installed on the outside of L-shaped steel plate 4. Then, bolts 7 are removed, and L-shaped steel plate 4 is pushed into the pre-reserved annular groove 8 in the main body of pipe section 2. After reaching the predetermined jacking position, L-shaped steel plate 4 is fixed with bolts. After L-shaped steel plate 4 is jacked and fixed, slots are cut and I-shaped steel plate 10 is jacked into the main body of pipe section 1. L-shaped steel plate 4 and I-shaped steel plate 10 are welded with fillet welds to form a waterproof and soil-retaining sealed space with the main body of pipe section. Under the protection of steel rings, the jacking is completed and the connecting channel between parallel jacking pipes is poured. This overcomes the water inrush problem during the traditional pipe section jacking, reduces construction risk, reduces reinforcement costs, and improves construction quality.

[0051] Specifically, the flexible sealant 5 is a two-component polysulfide sealant. The L-shaped steel plate 4 is fixed to the main body of the pipe section 1 with bolts 7. The elastic sealing gasket 9 is an EPDM rubber elastic sealing gasket. The pipe section is equipped with a prefabricated straight steel plate 10, which has a cutting edge on the outside to facilitate jacking during construction.

[0052] The method for using prefabricated pipe sections for lateral opening in parallel pipe jacking according to this embodiment includes the following steps:

[0053] Step 1: Precast pipe section body 1; Pipe section body 2;

[0054] Step 2: After the main pipe jacking construction is completed, install jack devices 11 in the pipe section body 1 at the position corresponding to the L-shaped steel plate 4.

[0055] Step 3: After the jack device 11 is installed, remove the fixing bolts 7 on the L-shaped steel plate 4;

[0056] Step 4: Use jack device 11 to push L-shaped steel plate 4 outwards until the end of L-shaped steel plate 4 enters the annular groove 8 reserved in the main body 2 of pipe section. The end of L-shaped steel plate 4 is wrapped by elastic sealing gasket 9 to prevent water leakage from the gap between L-shaped steel plate 4 and annular groove 8.

[0057] Step 5: Secure the L-shaped steel plate 4 with bolts 7 and remove the jack device 11;

[0058] Step 6: Open a straight groove 12 on the upper part of the inner side wall of the pipe section body 1, corresponding to the straight groove 6. When opening the groove, care should be taken to protect the flexible sealant 5 filled in the straight groove 6 to prevent water leakage.

[0059] Step 7: Place a prefabricated straight steel plate 10 with a cutting edge in the straight groove 12 at the top of the main body of the pipe section 1.

[0060] Step 8: Install a jack device 11 inside the main body of the pipe section 1 at the position corresponding to the straight steel plate 10;

[0061] Step 9: Use the jack device 11 to push the straight steel plate 10 outwards until the end of the straight steel plate 10 enters the annular groove 8 reserved in the main body 2 of the pipe section. The end of the straight steel plate 10 is wrapped by the elastic sealing gasket 9 to prevent water leakage from the gap between the straight steel plate 10 and the annular groove 8.

[0062] Step 10: After the straight steel plate 10 at the top of the main body of pipe section 1 is pushed in, the L-shaped steel plate 4 and the straight steel plate 10 are welded inside the main body of pipe section 1 using fillet weld 13.

[0063] Step 11: Repeat steps 7 to 10 above to complete the jacking and welding of the L-shaped steel plates 10 on both sides and bottom of the main body of the pipe section 1. At this time, the L-shaped steel plate 4, the L-shaped steel plate 10 and the main body of the pipe section have formed a sealed space that can be waterproof and retain soil.

[0064] Step 12: Under the protection of L-shaped steel plate 4 and straight steel plate 10, complete the opening of the jacking pipe and the pouring of the connecting channel between parallel jacking pipes.

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for using prefabricated pipe sections for lateral opening in parallel pipe jacking, characterized in that, The prefabricated pipe section for parallel jacking lateral opening includes a pipe section body one (1) and a pipe section body two (2). The four corners of the side wall of the pipe section body one (1) are reserved with L-shaped channels (3) with through gaps. An L-shaped steel plate (4) is placed in the L-shaped channel (3). The outer side of the L-shaped steel plate (4) has a cutting edge to facilitate jacking during construction. The gap between the L-shaped channel (3) and the L-shaped steel plate (4) is sealed with flexible sealant (5) waterproof material to prevent water leakage. A straight groove (6) is provided on the outer side of the pipe section body one (1). The straight groove (6) is filled with flexible sealant (5). An annular groove (8) is provided on the outer side of the pipe section body two (2). Several elastic sealing gaskets (9) are placed in the annular groove (8). The usage method includes the following steps: Step 1: Precast pipe section body one (1), pipe section body two (2); Step 2: After the main pipe jacking construction is completed, a jack device (11) is installed in the main pipe section (1) at the position corresponding to the L-shaped steel plate (4); Step 3: After the jack device (11) is installed, remove the fixing bolts (7) on the L-shaped steel plate (4); Step 4: Use a jack device (11) to push the L-shaped steel plate (4) outwards until the end of the L-shaped steel plate (4) enters the annular groove (8) reserved in the main body of the pipe section (2). The end of the L-shaped steel plate (4) is wrapped by an elastic sealing gasket (9) to prevent water leakage from the gap between the L-shaped steel plate (4) and the annular groove (8). Step 5: Secure the L-shaped steel plate (4) with bolts (7) and remove the jack device (11); Step 6: Open a straight groove (12) on the upper part of the inner side wall of the pipe section body (1) corresponding to the straight groove (6). When opening the groove, care should be taken to protect the flexible sealant (5) filled in the straight groove (6) to prevent water leakage when opening the groove. Step 7: Place a prefabricated straight steel plate (10) with a cutting edge in the straight groove (12) at the top of the main body of the pipe section (1); Step 8: Install a jack device (11) in the main body of the pipe section (1) at the position corresponding to the straight steel plate (10); Step 9: Use a jack device (11) to push the straight steel plate (10) towards the outside of the pipe section until the end of the straight steel plate (10) enters the annular groove (8) reserved in the main body of the pipe section (2). The end of the straight steel plate (10) is wrapped by an elastic sealing gasket (9) to prevent water leakage from the gap between the straight steel plate (10) and the annular groove (8). Step 10: After the straight steel plate (10) at the top of the main body of pipe section 1 (1) is pushed in, the L-shaped steel plate (4) and the straight steel plate (10) are welded inside the main body of pipe section 1 (1) using fillet weld (13); Step 11: Repeat steps 7 to 10 above to complete the straight steel plates (10) on both sides and bottom of the main body of pipe section one (1). The L-shaped steel plate (4), the straight steel plate (10) and the main body of the pipe section have formed a sealed space that can be waterproof and retain soil. Step 12: Under the protection of L-shaped steel plate (4) and straight steel plate (10), complete the opening of the jacking pipe and the pouring of the connecting channel between parallel jacking pipes.

2. The method of using a prefabricated pipe section for lateral opening in parallel pipe jacking according to claim 1, characterized in that, The flexible sealant (5) is a two-component polysulfide sealant.

3. The method of using a prefabricated pipe section for lateral opening in parallel pipe jacking according to claim 1, characterized in that, The L-shaped steel plate (4) is fixed to the main body of the pipe section (1) by bolts (7).

4. The method of using a prefabricated pipe section for lateral opening in parallel pipe jacking according to claim 1, characterized in that, The elastic sealing gasket (9) is made of EPDM rubber.

5. The method of using a prefabricated pipe section for lateral opening in parallel pipe jacking according to claim 1, characterized in that, The pipe section is equipped with a prefabricated straight steel plate (10), the outer side of which has a cutting edge to facilitate jacking during construction.

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